SKF · super precision bearings
SKF 71940 CD/P4A
Super-precision angular contact ball bearings — manufacturer technical reference and quotation support in Saudi Arabia.
لطلب عرض سعر في السعودية، أرسل رقم القطعة أو المقاس والكمية والمدينة. يُرجى تأكيد التوافق والتوفر والسعر مع فريقنا.
| Bore diameter | 200 mm |
|---|---|
| Outside diameter | 280 mm |
| Width | 38 mm |
| Contact angle | 15 ° |
| Basic dynamic load rating | 221 kN |
| Basic static load rating | 265 kN |
| Attainable speed for grease lubrication | 4800 r/min |
| Attainable speed for oil-air lubrication | 7000 r/min |
| Contact type | Normal contact (two-point contact) |
| Number of rows | 1 |
| Ring type | One-piece inner and outer rings |
| Design | High-capacity D |
| Universal matching bearing | No |
| Matched arrangement | No |
| Matched condition (axial clearance/ preload) | Not applicable |
| Tolerance class | P4A |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Indicative carbon footprint for new product | 22.3 kg CO_2e |
| Product net weight | 6.04 kg |
| eClass code | 23-05-08-04 |
| UNSPSC code | 31171531 |
| Universal matching bearing(s) | No |
| Dimensions · Bore diameter · (d) | 200 mm |
| Dimensions · Outside diameter · (D) | 280 mm |
| Dimensions · Width · (B) | 38 mm |
| Dimensions · Shoulder diameter of inner ring (large side face) · (d_1) | 224.7 mm |
| Dimensions · Shoulder diameter of inner ring (small side face) · (d_2) | 224.7 mm |
| Dimensions · Shoulder diameter of outer ring (large side face) · (D_1) | 255.3 mm |
| Dimensions · Chamfer dimension · (r_1,2) · min. | 2.1 mm |
| Dimensions · Chamfer dimension · (r_3,4) · min. | 1 mm |
| Dimensions · Distance from side face to pressure point · (a) | 51.3 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_a) · min. | 211 mm |
| Abutment dimensions · Diameter of shaft abutment · (d_b) · min. | 211 mm |
| Abutment dimensions · Diameter of housing abutment · (D_a) · max. | 269 mm |
| Abutment dimensions · Diameter of housing abutment · (D_b) · max. | 275 mm |
| Abutment dimensions · Radius of fillet · (r_a) · max. | 2 mm |
| Abutment dimensions · Radius of fillet · (r_b) · max. | 1 mm |
| Abutment dimensions · Position of oil nozzle · (d_n) | 231.4 mm |
| Calculation data · Basic dynamic load rating · (C) | 221 kN |
| Calculation data · Basic static load rating · (C_0) | 265 kN |
| Calculation data · Fatigue load limit · (P_u) | 7.2 kN |
| Calculation data · Attainable speed for grease lubrication | 4800 r/min |
| Calculation data · Attainable speed for oil-air lubrication | 7000 r/min |
| Calculation data · Contact angle · (α) | 15 ° |
| Calculation data · Ball diameter · (D_w) | 25.4 mm |
| Calculation data · Number of rows · (i) | 1 |
| Calculation data · Number of balls (per bearing) · (z) | 26 |
| Calculation data · Reference grease quantity (per bearing) · (G_ref) | 81 cm³ |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Preload, class A · (G_A) | 800 N |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Axial stiffnes for preload A (sets of two brgs back to back or face to face) | 202 N/µm |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Preload, class B · (G_B) | 1600 N |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face) | 275 N/µm |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Preload, class C · (G_C) | 3200 N |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face) | 387 N/µm |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Preload, class D · (G_D) | 6400 N |
| Calculation data · Preload and stiffness (back-to-back, face-to-face) · Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face) | 565 N/µm |
| Calculation data · Correction factors for preload calculation · Correction factor dependent on bearing series and size · (f) | 1.2 |
| Calculation data · Correction factors for preload calculation · Correction factor dependent on contact angle · (f_1) | 1 |
| Calculation data · Correction factors for preload calculation · Correction factor, preload class A · (f_2A) | 1 |
| Calculation data · Correction factors for preload calculation · Correction factor, preload class B · (f_2B) | 1 |
| Calculation data · Correction factors for preload calculation · Correction factor, preload class C · (f_2C) | 1.1 |
| Calculation data · Correction factors for preload calculation · Correction factor, preload class D · (f_2D) | 1.2 |
| Calculation data · Correction factors for preload calculation · Correction factor for hybrid bearings · (f_HC) | 1 |
| Calculation data · Factors for equivalent bearing load calculation · Calculation factor for equivalent loads · (f_0) | 16.3 |
| Calculation data · Factors for equivalent bearing load calculation · Additional factors for equivalent loads | Refer to Notes 1 and 2 below |
Family specifications and selection conditions
| Product description | These super-precision, high-capacity, single row angular contact ball bearings, with 15° contact angle, accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only. They are designed to accommodate heavy loads at relatively high speeds under low to moderate operating temperatures. |
|---|---|
| Manufacturer features | Very high running accuracy • Very high load carrying capacity • Relatively high speed and stiffness |
Manufacturer references
Follow the complete manufacturer documentation for application restrictions, materials, tolerances and installation requirements. Limits may not apply simultaneously. We do not publish inferred stock, pricing or ratings.